import java.util. * ;
import java.awt. * ;
import java.awt.event. * ;
import javax.swing. * ;

public class BreakthroughGUI {
    //Button array
    JButton[][] BUTTONS;

    //'Selected' GameButton Placeholder
    GameButton selectedButton;

    //Constructor
    public BreakthroughGUI() {
        //set up GUI
        JFrame frame = new JFrame("Breakthrough");

        frame.setLayout(new GridLayout(8, 8));

        selectedButton = null;

        //Create the buttons
        //We want our board to be 8x8,
        //so we'll make an 8x8 2D array
        int cols = 8;
        int rows = 8;

        BUTTONS = new GameButton[cols][rows];


        //now we loop  through the board and instantiate a button for each
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                GameButton theButt = new GameButton();
                BUTTONS[i][j] = theButt;
                theButt.setXPos(j);
                theButt.setYPos(i);
                //BUTTONS[i][j].setID(500);
                frame.add(BUTTONS[i][j]);
            }
        }

        for (int x = 0; x < 2; x++) {
            for (int y = 0; y < 8; y++) {
                BUTTONS[y][x].setText("X");
            }
        }

        for (int z = 7; z > 5; z--) {
            for (int y = 0; y < 8; y++) {
                BUTTONS[y][z].setText("O");
            }
        }



        for (int i = 0; i < 8; i++) {
            for (int j = 0; j < 8; j++) {
                BUTTONS[i][j].addActionListener(new ActionListener() {
                    public void actionPerformed(ActionEvent ae) {
                        GameButton button = (GameButton) ae.getSource();

                        if (selectedButton == null) {
                            select(button);
                        } else {
                            if (selectedButton.getText() == "X") {
                                //Check if it's going backwards
                                if (button.getXPos() < selectedButton.getXPos()) {
                                    //Drop out if it is backwards
                                    return;
                                }

                                //Check to see if it's in front of the selected box
                                //If we subtract the clicked squares's point from the selected square's point,
                                // x should be 1 and y should be -1 through 1
                                int xDif = button.getXPos() - selectedButton.getXPos();
                                if (xDif != 1) {
                                    return;
                                }

                                int yDif = button.getYPos() - selectedButton.getYPos();
                                if (-1 > yDif || yDif > 1) {
                                    return;
                                }

                                //Should be all clear for now (the return;s would have dropped us out of the method
                                // if the x and y difs didnt match what we need



                                //Move the 'X' over
                                selectedButton.setText("");
                                button.setText("X");

                                deselect();



                            } else if (selectedButton.getText() == "O") {
                                //Check if it's going backwards
                                if (button.getXPos() > selectedButton.getXPos()) {
                                    //Drop out if it is backwards
                                    return;
                                }

                                //Check to see if it's in front of the selected box
                                //If we subtract the clicked squares's point from the selected square's point,
                                // x should be -1 and y should be -1 through 1
                                int xDif = button.getXPos() - selectedButton.getXPos();
                                if (xDif != -1) {
                                    return;
                                }

                                int yDif = button.getYPos() - selectedButton.getYPos();
                                if (-1 > yDif || yDif > 1) {
                                    return;
                                }

                                //Should be all clear for now (the return;s would have dropped us out of the method
                                // if the x and y difs didnt match what we need



                                //Move the 'O' over
                                selectedButton.setText("");
                                button.setText("O");

                                deselect();
                            }
                        }



                    }


                });
            }
        }


        frame.setVisible(true);
        frame.pack();
        frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
    }

    //Main constructor
    public static void main(String[] args) {
        new BreakthroughGUI();
    }

    //Functions for changing whats selected and what isn't
    // This lets us change what happens during the (de)select process
    //  (e.g. graphical attributes, text changes, etc)
    public void deselect() {
        selectedButton.setEnabled(true);
        selectedButton = null;

    }

    public void select(GameButton btn) {
        selectedButton = btn;
        selectedButton.setEnabled(false);
    }
}


//Here's our custom button class!
class GameButton extends JButton {
    //Positions in the grid
    private int xPos = -1;
    private int yPos = -1;


    //Constructor
    public GameButton() {
        super();
    }


    //Getters and Setters for the grid position
    public void setXPos(int val) {
        xPos = val;
    }

    public void setYPos(int val) {
        yPos = val;
    }

    public int getXPos() {
        return xPos;
    }

    public int getYPos() {
        return yPos;
    }
}